import java.util.Scanner;
//https://www.nowcoder.com/practice/4b91205483694f449f94c179883c1fef?tpId=60&&tqId=29483&rp=1&ru=/
// activity/oj&qru=/ta/tsing-kaoyan/question-ranking
class TreeNode {
    TreeNode left;
    TreeNode right;
    char val;
    public TreeNode(char val) {
        this.val = val;
    }
}
// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        while (in.hasNextLine()) { // 注意 while 处理多个 case
            String str = in.nextLine();
            TreeNode root = createBinaryTree(str);
            inorder(root);
        }
    }

    private static void inorder(TreeNode root) {
        if (root == null) return;
        inorder(root.left);
        System.out.print(root.val+" ");
        inorder(root.right);
    }

    static int index;
    private static TreeNode createBinaryTree(String str) {
        char ch = str.charAt(index++);
        if (ch == '#') {
            return null;
        }
        TreeNode node = new TreeNode(ch);
        TreeNode left = createBinaryTree(str);
        node.left = left;
        TreeNode right = createBinaryTree(str);
        node.right = right;
        return node;
    }
}